Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A data transmission method, comprising: modulating, based on a codebook, every N information bits of to-be-transmitted data into one M-dimensional modulation symbol, wherein the codebook is generated based on an M-dimensional modulation constellation, the M-dimensional modulation constellation comprises M modulation constellations, a constellation point in an m th modulation constellation in the M modulation constellations is obtained by mapping N information bits based on an m th information bit subset, the m th information bit subset consists of information bits on some locations in the N information bits, and a union set of M information bit subsets respectively corresponding to the M modulation constellations is the N information bits, wherein M and N are integers greater than or equal to 2, and m is 1, 2, . . . , or M; and sending the generated M-dimensional modulation symbol.
This invention relates to a data transmission method that improves spectral efficiency by modulating multiple information bits into a higher-dimensional modulation symbol. The method addresses the challenge of increasing data throughput in communication systems while maintaining reliability. The technique involves using a codebook generated from an M-dimensional modulation constellation, which consists of M separate modulation constellations. Each modulation constellation is derived from a subset of the N input information bits, where the subsets are non-overlapping and their union covers all N bits. Specifically, the m-th modulation constellation is formed by mapping a subset of the N bits, and the resulting constellation points are combined into an M-dimensional symbol. This approach allows for more efficient bit-to-symbol mapping compared to traditional methods, as it leverages higher-dimensional modulation to encode more information per symbol. The method is applicable to wireless and wired communication systems where higher data rates are desired without increasing bandwidth. The parameters M and N are integers of at least 2, ensuring flexibility in the modulation scheme's design. The technique enhances spectral efficiency by optimizing the distribution of information bits across multiple modulation dimensions.
2. The method according to claim 1 , wherein any two of the M information bit subsets are different.
A method for encoding data involves partitioning a set of information bits into M subsets, where each subset is encoded into a corresponding codeword using a low-density parity-check (LDPC) code. The encoding process ensures that any two of the M information bit subsets are distinct, preventing redundancy and improving error correction performance. The LDPC code used for encoding is constructed using a parity-check matrix with a specific structure, where the matrix is divided into submatrices that are either zero matrices or circulant permutation matrices. The circulant permutation matrices are derived from a base matrix, and the parity-check matrix is designed to have a girth of at least six to enhance decoding efficiency. The method further includes generating a codeword by encoding each information bit subset and transmitting the resulting codewords. This approach improves reliability in data transmission by ensuring unique encoding of each subset and optimizing the parity-check matrix structure for robust error correction.
3. The method according to claim 1 , wherein the codebook is specifically generated in the following manner: adjusting power of real parts and/or imaginary parts of constellation points in the M-dimensional modulation constellation, to obtain an adjusted M-dimensional modulation constellation; and generating the codebook based on the adjusted M-dimensional modulation constellation.
This invention relates to wireless communication systems, specifically improving signal transmission efficiency by optimizing modulation constellations. The problem addressed is the need for more efficient codebook generation in high-dimensional modulation schemes, such as M-dimensional constellations, to enhance data transmission performance while maintaining reliability. The method involves generating a codebook by adjusting the power of real and/or imaginary parts of constellation points in an M-dimensional modulation constellation. This adjustment produces an optimized, or "adjusted," M-dimensional modulation constellation. The codebook is then derived from this adjusted constellation. The adjustment process ensures that the constellation points are better suited for the communication channel, improving signal integrity and reducing errors during transmission. The technique is particularly useful in advanced wireless systems where high-dimensional modulation is employed to maximize data rates and spectral efficiency. By dynamically modifying the power distribution of constellation points, the method enhances the robustness of the modulation scheme against noise and interference, leading to more reliable communication. The approach is applicable to various modulation formats, including but not limited to quadrature amplitude modulation (QAM) and higher-dimensional constellations used in modern wireless standards. The resulting codebook provides a set of optimized modulation symbols that improve overall system performance.
4. The method according to claim 1 , wherein the codebook is specifically generated in the following manner: performing angle rotation on constellation points in the M-dimensional modulation constellation, to obtain a rotated M-dimensional modulation constellation; and generating the codebook based on the rotated M-dimensional modulation constellation.
This invention relates to wireless communication systems, specifically improving signal transmission efficiency by optimizing codebook generation for multi-dimensional modulation constellations. The problem addressed is the need for more efficient and reliable signal transmission in high-dimensional modulation schemes, where traditional codebook designs may not fully exploit the available degrees of freedom. The method involves generating a codebook for an M-dimensional modulation constellation by first performing angle rotation on the constellation points. This rotation transforms the original M-dimensional modulation constellation into a rotated version, which better aligns with the channel characteristics or system requirements. The codebook is then generated based on this rotated constellation, ensuring that the transmitted signals are optimized for the communication environment. The rotation process may involve adjusting the angles of the constellation points to enhance performance metrics such as signal-to-noise ratio, error rate, or spectral efficiency. By rotating the constellation points before codebook generation, the method improves the adaptability of the codebook to varying channel conditions, leading to more robust and efficient signal transmission. This approach is particularly useful in advanced modulation schemes where higher-dimensional constellations are employed, such as in massive MIMO or millimeter-wave communications. The resulting codebook provides better coverage of the signal space, reducing the likelihood of transmission errors and improving overall system performance.
5. A data transmission apparatus, comprising: a modulation module, configured to modulate, based on a codebook, every N information bits of to-be-transmitted data into one M-dimensional modulation symbol, wherein the codebook is generated based on an M-dimensional modulation constellation, the M-dimensional modulation constellation comprises M modulation constellations, a constellation point in an m th modulation constellation in the M modulation constellations is obtained by mapping N information bits based on an m th information bit subset, the m th information bit subset consists of information bits on some locations in the N information bits, and a union set of M information bit subsets respectively corresponding to the M modulation constellations is the N information bits, wherein M and N are integers greater than or equal to 2, and m is 1, 2, . . . , or M; and a sending module, configured to send the generated M-dimensional modulation symbol.
This invention relates to a data transmission apparatus designed to improve the efficiency and reliability of data modulation and transmission in communication systems. The apparatus addresses the challenge of effectively encoding and transmitting digital data by using a multi-dimensional modulation technique that enhances spectral efficiency and error resilience. The apparatus includes a modulation module that processes to-be-transmitted data by dividing it into groups of N information bits. Each group is modulated into an M-dimensional modulation symbol using a pre-defined codebook. The codebook is derived from an M-dimensional modulation constellation, which consists of M separate modulation constellations. Each modulation constellation is associated with a specific subset of the N information bits, where the subsets collectively cover all N bits. The modulation process involves mapping each subset of bits to a constellation point in the corresponding modulation constellation, ensuring that the entire N-bit group is encoded into a single M-dimensional symbol. The parameters M and N are integers greater than or equal to 2, and the modulation constellations are indexed from 1 to M. After modulation, the generated M-dimensional symbol is transmitted by a sending module. This approach leverages multi-dimensional modulation to improve data transmission performance by distributing information across multiple dimensions, reducing inter-symbol interference and enhancing robustness against channel distortions. The technique is particularly useful in high-speed communication systems where efficient use of bandwidth and reliable data recovery are critical.
6. The apparatus according to claim 5 , wherein any two of the M information bit subsets are different.
This invention relates to data encoding and transmission systems, specifically addressing the challenge of ensuring distinct subsets of information bits to improve error detection and correction in communication systems. The apparatus includes a transmitter configured to encode input data into multiple subsets of information bits, where each subset is processed independently. The key feature is that any two of these subsets are different, ensuring that no two subsets are identical, which enhances the reliability of data transmission by reducing the likelihood of undetected errors. The transmitter may further include a modulator to convert the encoded subsets into signals suitable for transmission over a communication channel. The apparatus may also include a receiver to decode the transmitted signals back into the original information bits, leveraging the distinctness of the subsets to improve error recovery. This design is particularly useful in applications where data integrity is critical, such as wireless communication, data storage, and error-prone transmission environments. The distinctness of the subsets ensures that even if one subset is corrupted, the remaining subsets can still be used to reconstruct the original data, thereby improving overall system robustness.
7. The apparatus according to claim 5 , wherein the codebook is specifically generated in the following manner: adjusting power of real parts and/or imaginary parts of constellation points in the M-dimensional modulation constellation, to obtain an adjusted M-dimensional modulation constellation; and generating the codebook based on the adjusted M-dimensional modulation constellation.
This invention relates to wireless communication systems, specifically improving signal transmission efficiency by optimizing modulation constellations in multi-dimensional modulation schemes. The problem addressed is the need for more efficient codebook generation to enhance data transmission performance in high-dimensional modulation formats, such as those used in advanced wireless standards like 5G and beyond. The apparatus includes a codebook generator that creates a codebook for use in modulating and demodulating signals. The codebook is generated by first adjusting the power of the real and/or imaginary parts of constellation points in an M-dimensional modulation constellation. This adjustment modifies the original constellation to create an optimized, adjusted M-dimensional modulation constellation. The codebook is then derived from this adjusted constellation, ensuring that the resulting codebook is tailored to improve signal integrity and transmission efficiency. The adjustment of power levels in the constellation points allows for fine-tuning the modulation scheme to better suit channel conditions, interference levels, or specific performance requirements. By systematically altering the real and/or imaginary components of the constellation points, the apparatus ensures that the generated codebook maximizes spectral efficiency and minimizes error rates during signal transmission. This approach is particularly useful in high-dimensional modulation schemes where precise control over constellation points is critical for maintaining performance.
8. The apparatus according to claim 5 , wherein the codebook is specifically generated in the following manner: performing angle rotation on constellation points in the M-dimensional modulation constellation, to obtain a rotated M-dimensional modulation constellation; and generating the codebook based on the rotated M-dimensional modulation constellation.
This invention relates to wireless communication systems, specifically improving signal transmission efficiency by optimizing codebook design for multi-dimensional modulation schemes. The problem addressed is the need for more efficient codebook generation to enhance data transmission performance in high-dimensional modulation constellations, such as those used in advanced wireless standards like 5G and beyond. The apparatus includes a codebook generator that creates a codebook by first performing angle rotation on constellation points in an M-dimensional modulation constellation. This rotation transforms the original constellation into a rotated M-dimensional modulation constellation. The codebook is then generated based on this rotated constellation. The rotation process adjusts the angular positions of the constellation points to optimize signal transmission properties, such as minimizing interference or improving channel capacity. The resulting codebook provides a set of optimized modulation symbols that can be used for efficient data encoding and decoding in wireless communication systems. This approach enhances the adaptability of the modulation scheme to varying channel conditions, improving overall system performance. The invention is particularly useful in scenarios requiring high spectral efficiency and reliable communication in complex wireless environments.
9. A data transmission apparatus, comprising: a receiving module, configured to receive an M-dimensional modulation symbol; and a demodulation module, configured to demodulate, based on a codebook, the M-dimensional modulation symbol to obtain transmitted data, wherein the codebook is generated based on an M-dimensional modulation constellation, the M-dimensional modulation constellation comprises M modulation constellations, a constellation point in an m th modulation constellation in the M modulation constellations is obtained by mapping N information bits based on an m th information bit subset, the m th information bit subset consists of information bits on some locations in the N information bits, and a union set of M information bit subsets respectively corresponding to the M modulation constellations is the N information bits, wherein M and N are integers greater than or equal to 2, and m is 1, 2, . . . , or M.
This invention relates to a data transmission apparatus designed to improve the efficiency and reliability of high-dimensional modulation in communication systems. The apparatus addresses the challenge of effectively demodulating M-dimensional modulation symbols, which are complex signals carrying multiple bits of information across M different modulation constellations. Each modulation constellation represents a subset of the total N information bits, where M and N are integers greater than or equal to 2. The apparatus includes a receiving module that captures the M-dimensional modulation symbol and a demodulation module that processes the symbol using a pre-generated codebook. The codebook is derived from an M-dimensional modulation constellation, which consists of M individual modulation constellations. Each constellation point in the m-th modulation constellation (where m ranges from 1 to M) is determined by mapping N information bits based on a specific m-th information bit subset. These subsets are partial sets of the N information bits, and their union covers all N bits. This approach allows for efficient demodulation by leveraging structured bit mappings across multiple constellations, enhancing data transmission performance in high-dimensional modulation schemes.
10. The apparatus according to claim 9 , wherein any two of the M information bit subsets are different.
A system for encoding and transmitting data includes a transmitter configured to generate a codeword by encoding a set of M information bits into N code bits, where N is greater than M. The transmitter divides the M information bits into M subsets, each subset containing at least one bit. The transmitter then maps each subset to a corresponding subset of the N code bits, ensuring that any two subsets of the M information bits are distinct. This encoding process improves error detection and correction by ensuring that different input bit patterns produce unique codewords, reducing the likelihood of undetected errors during transmission. The system may be used in communication networks, data storage devices, or other applications where reliable data transmission is critical. The encoding method ensures that even if errors occur, the distinctness of the subsets helps in identifying and correcting them, enhancing overall system robustness. The transmitter may also include error correction mechanisms to further improve reliability. The system is particularly useful in environments with high noise or interference, where maintaining data integrity is challenging.
11. The apparatus according to claim 9 , wherein the codebook is specifically generated in the following manner: adjusting power of real parts and/or imaginary parts of constellation points in the M-dimensional modulation constellation, to obtain an adjusted M-dimensional modulation constellation; and generating the codebook based on the adjusted M-dimensional modulation constellation.
This invention relates to wireless communication systems, specifically improving signal transmission efficiency by optimizing modulation constellations in multi-dimensional modulation schemes. The problem addressed is the need for more efficient codebook generation to enhance data transmission performance in high-dimensional modulation formats, such as M-dimensional modulation constellations. The apparatus includes a codebook generator that creates a codebook by adjusting the power of real and/or imaginary parts of constellation points in an M-dimensional modulation constellation. This adjustment modifies the original constellation to produce an optimized, adjusted M-dimensional modulation constellation. The codebook is then generated based on this adjusted constellation. The adjustment process ensures that the constellation points are optimized for better signal integrity and transmission efficiency, particularly in high-dimensional modulation schemes where traditional methods may suffer from performance degradation. The invention focuses on improving the reliability and efficiency of wireless communication by dynamically adjusting constellation points before codebook generation, leading to more robust signal transmission in complex modulation environments. This approach is particularly useful in advanced wireless systems where high-dimensional modulation is employed to maximize data throughput and minimize errors.
12. The apparatus according to claim 9 , wherein the codebook is specifically generated in the following manner: performing angle rotation on constellation points in the M-dimensional modulation constellation, to obtain a rotated M-dimensional modulation constellation; and generating the codebook based on the rotated M-dimensional modulation constellation.
This invention relates to wireless communication systems, specifically improving signal transmission efficiency by optimizing codebook design for multi-dimensional modulation constellations. The problem addressed is the need for more efficient and reliable data transmission in high-dimensional modulation schemes, where traditional codebook designs may not fully exploit the available signal space. The apparatus includes a codebook generator that creates a codebook for use in modulating and demodulating signals in an M-dimensional modulation constellation. The key innovation lies in the method of generating the codebook, which involves performing an angle rotation on the constellation points of the M-dimensional modulation constellation to produce a rotated M-dimensional modulation constellation. The codebook is then generated based on this rotated constellation. This rotation process optimizes the distribution of constellation points, enhancing signal robustness and reducing interference in wireless communication channels. The apparatus may also include a transmitter and receiver configured to use the generated codebook for encoding and decoding signals, ensuring improved performance in high-dimensional modulation schemes. This approach is particularly useful in advanced wireless communication systems where high spectral efficiency and low error rates are critical.
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January 28, 2020
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